Rosetta-7B-Instruct

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Rosetta-7B-Instruct

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Introduction

Rosetta-7B-Instruct is a 7B-parameter bilingual (Korean-English) instruction-tuned model developed by PoSTMEDIA. Built on PoSTMEDIA's Rosetta dense decoder-only architecture, it is post-trained from Rosetta-7B-Base through large-scale supervised fine-tuning and preference optimization, with a deliberate focus on the capabilities that matter most in real Korean-language deployments: instruction following, Korean cultural and factual knowledge, and Korean mathematical reasoning.

Rosetta-7B is a three-model family covering the full spectrum from research to production:

Highlights

• Korean math reasoning leader — HRM8K 60.4, the top score in our eight-model same-protocol comparison of Korean and global open models
• Top-tier instruction following — IFEval 80.4, within the leading group of Korean open models
• Korean-first design — 161K Korean-extended vocabulary, dedicated Korean continual-pretraining stage, and in-house synthetic Korean data assets
• Strong Korean factuality — KoSimpleQA 71.7
• 65,536-token context window with interleaved local-global attention
• Apache-2.0 — unrestricted commercial use

Model Summary

<div align="center"> <table><tbody> <tr><td><b>Architecture</b></td><td>Rosetta dense decoder-only Transformer (<code>RosettaForCausalLM</code>)</td></tr> <tr><td><b>Parameters</b></td><td>7B</td></tr> <tr><td><b>Layers</b></td><td>32</td></tr> <tr><td><b>Hidden size</b></td><td>4,096</td></tr> <tr><td><b>Attention heads</b></td><td>32</td></tr> <tr><td><b>Attention pattern</b></td><td>interleaved sliding-window (4,096) + global, 3:1, with QK-normalization</td></tr> <tr><td><b>Context length</b></td><td>65,536</td></tr> <tr><td><b>Vocabulary</b></td><td>161,425 (Korean-extended)</td></tr> <tr><td><b>Post-training</b></td><td>SFT → preference optimization (DPO)</td></tr> <tr><td><b>License</b></td><td>Apache-2.0</td></tr> </tbody></table> </div>

Training Overview

The Rosetta-7B family was built through a multi-stage pipeline carried out end-to-end by PoSTMEDIA:

1. Pretraining on trillions of tokens of curated bilingual web, code, and academic text
2. Staged mid-training for reasoning-dense data and long-context extension up to 65K
3. Korean continual pretraining on curated Korean corpora plus in-house synthetic Korean data assets, with the vocabulary extended to 161K for efficient Korean tokenization
4. Post-training — large-scale supervised fine-tuning followed by preference optimization (DPO) targeting instruction following, factuality, and safe refusals

Evaluation Results

All models in the table below, including competitors, were re-evaluated in-house under an identical protocol (lm-evaluation-harness + vLLM ≥ 0.26, identical prompts, decoding parameters, and generation budgets). Scores are therefore directly comparable within this table, but may differ from numbers reported elsewhere under different setups.

<!-- prettier-ignore --> <table> <tr> <th style="background: rgba(128,128,128,0.1); text-align: center;">Benchmark</th> <th style="background: rgba(128,128,128,0.1); text-align: center;"><b>Rosetta-7B-Instruct</b><br>^7B</th> <th style="background: rgba(128,128,128,0.1); text-align: center;">A.X-4.0-Light<br>^7B</th> <th style="background: rgba(128,128,128,0.1); text-align: center;">A.X-3.1-Light<br>^7B</th> <th style="background: rgba(128,128,128,0.1); text-align: center;">EXAONE-3.5<br>^7.8B</th> <th style="background: rgba(128,128,128,0.1); text-align: center;">Midm-2.0-Base<br>^11.5B</th> <th style="background: rgba(128,128,128,0.1); text-align: center;">kanana-2<br>^3B</th> <th style="background: rgba(128,128,128,0.1); text-align: center;">Llama-3.1<br>^8B</th> <th style="background: rgba(128,128,128,0.1); text-align: center;">Ministral-3<br>^8B</th> </tr> <tr> <td align="center" colspan="9" style="background: linear-gradient(90deg, rgba(0,82,204,0.30) 0%, rgba(0,163,255,0.30) 50%, rgba(120,86,255,0.30) 100%); font-weight: bold; height: 32px; padding-top: 2px; padding-bottom: 2px;"><i>General &amp; Reasoning</i></td> </tr> <tr> <td>MMLU</td> <td align="center">60.2</td> <td align="center">73.0</td> <td align="center">57.7</td> <td align="center"><b>73.4</b></td> <td align="center">68.0</td> <td align="center">59.5</td> <td align="center">66.6</td> <td align="center">72.4</td> </tr> <tr> <td>GPQA</td> <td align="center">39.4</td> <td align="center">37.4</td> <td align="center">30.8</td> <td align="center">36.9</td> <td align="center">31.8</td> <td align="center">32.3</td> <td align="center">22.7</td> <td align="center"><b>49.5</b></td> </tr> <tr> <td>GSM8K</td> <td align="center">79.8</td> <td align="center">68.1</td> <td align="center">84.0</td> <td align="center"><b>88.9</b></td> <td align="center">80.7</td> <td align="center">70.0</td> <td align="center">84.2</td> <td align="center">80.8</td> </tr> <tr> <td>IFEval</td> <td align="center">80.4</td> <td align="center"><b>82.8</b></td> <td align="center">77.3</td> <td align="center">82.1</td> <td align="center">81.3</td> <td align="center">76.5</td> <td align="center">80.0</td> <td align="center">63.8</td> </tr> <tr> <td align="center" colspan="9" style="background: linear-gradient(90deg, rgba(0,82,204,0.30) 0%, rgba(0,163,255,0.30) 50%, rgba(120,86,255,0.30) 100%); font-weight: bold; height: 32px; padding-top: 2px; padding-bottom: 2px;"><i>Korean Language &amp; Knowledge</i></td> </tr> <tr> <td>KMMLU</td> <td align="center">45.6</td> <td align="center"><b>58.1</b></td> <td align="center">49.9</td> <td align="center">52.0</td> <td align="center">56.4</td> <td align="center">44.4</td> <td align="center">42.7</td> <td align="center">48.5</td> </tr> <tr> <td>CLIcK</td> <td align="center">59.2</td> <td align="center">68.1</td> <td align="center">53.0</td> <td align="center">66.2</td> <td align="center"><b>70.7</b></td> <td align="center">58.2</td> <td align="center">54.7</td> <td align="center">55.0</td> </tr> <tr> <td>HAE-RAE</td> <td align="center">63.0</td> <td align="center">74.0</td> <td align="center">67.0</td> <td align="center">73.7</td> <td align="center"><b>79.2</b></td> <td align="center">70.8</td> <td align="center">55.3</td> <td align="center">56.8</td> </tr> <tr> <td>HRM8K</td> <td align="center"><b>60.4</b></td> <td align="center">46.4</td> <td align="center">51.1</td> <td align="center">49.8</td> <td align="center">51.2</td> <td align="center">31.4</td> <td align="center">30.8</td> <td align="center">54.2</td> </tr> <tr> <td>KoSimpleQA^†</td> <td align="center">71.7</td> <td align="center">77.5</td> <td align="center">45.9</td> <td align="center">78.9</td> <td align="center"><b>88.9</b></td> <td align="center">81.0</td> <td align="center">—</td> <td align="center">72.1</td> </tr> </table> _{<b>Bold</b> indicates the best score in each row. — indicates not evaluated. ^† KoSimpleQA is evaluated as a judge-free 10-choice MCQA variant. Generative benchmarks use greedy decoding; subtask-style suites report the unweighted subtask mean.}

In the broadest same-protocol comparison we are aware of for Korean open models, Rosetta-7B-Instruct holds the top score on Korean mathematical reasoning (HRM8K 60.4) — ahead of every Korean flagship in the table — while placing in the leading group on instruction following (IFEval 80.4) and Korean factuality (KoSimpleQA 71.7). Models that lead on knowledge-recall benchmarks are either substantially larger (Midm-2.0-Base, 11.5B) or newest-generation flagships, and none of them match Rosetta on Korean math.

Quickstart

Transformers

Requires transformers>=5.13 and trust_remote_code=True (the Rosetta architecture ships as custom code in this repository).

from transformers import AutoModelForCausalLM, AutoTokenizer

model_id = "PoSTMEDIA/Rosetta-7B-Instruct"
tokenizer = AutoTokenizer.from_pretrained(model_id)
model = AutoModelForCausalLM.from_pretrained(
    model_id, dtype="bfloat16", device_map="auto", trust_remote_code=True
)

messages = [
    {"role": "user", "content": "한국의 전통 발효 음식 세 가지를 소개해줘."},
]
inputs = tokenizer.apply_chat_template(
    messages, add_generation_prompt=True, return_tensors="pt"
).to(model.device)

out = model.generate(inputs, max_new_tokens=1024, temperature=0.7, top_p=0.9, do_sample=True)
print(tokenizer.decode(out[0][inputs.shape[1]:], skip_special_tokens=True))

vLLM

Use the PoSTMEDIA vLLM distribution with native Rosetta support — no trust_remote_code required:

VLLM_USE_PRECOMPILED=1 pip install git+https://github.com/PoSTMEDIA-AI/vllm@rosetta-v0.26.0

vllm serve PoSTMEDIA/Rosetta-7B-Instruct --dtype bfloat16

from openai import OpenAI

client = OpenAI(base_url="http://localhost:8000/v1", api_key="EMPTY")
resp = client.chat.completions.create(
    model="PoSTMEDIA/Rosetta-7B-Instruct",
    messages=[{"role": "user", "content": "부산 여행 1박 2일 코스를 짜줘."}],
    temperature=0.7,
)
print(resp.choices[0].message.content)

[!IMPORTANT] vLLM v0.26 or later is required. Recommended sampling: temperature 0.7, top_p 0.9 (or greedy for deterministic tasks).

Limitations

• The model can generate factually incorrect or outdated information; verify outputs for high-stakes use.
• Outputs may reflect biases present in web-scale training data.
• Optimized for Korean and English; other languages are not guaranteed.
• Alignment was performed on contexts up to 32K tokens; validate quality for longer inputs.

License

Apache License 2.0 — see LICENSE. If you build something with Rosetta, we'd appreciate a "Built with Rosetta" attribution.

Citation

@misc{rosetta2026,
  title  = {Rosetta-7B: A Bilingual Korean-English Language Model Family},
  author = {{PoSTMEDIA AI Lab}},
  year   = {2026},
  url    = {https://huggingface.co/collections/PoSTMEDIA/rosetta-6a9db30fd1b4585b0c1845e9}
}

Contact

Questions and feedback — please open a discussion on the model page.